Added SILC DLL API for loading/using shared objects/DLLs.

[silc.git] / lib / silcutil / silcdll.c

diff --git a/lib/silcutil/silcdll.c b/lib/silcutil/silcdll.c
new file mode 100644 (file)
index 0000000..20acef0
--- /dev/null
+++ b/lib/silcutil/silcdll.c
@@ -0,0 +1,85 @@
+/*
+
+  silcdll.c
+
+  Author: Pekka Riikonen <priikone@silcnet.org>
+
+  Copyright (C) 2007 Pekka Riikonen
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; version 2 of the License.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+*/
+
+#include "silc.h"
+
+/* Load shared object */
+
+SilcDll silc_dll_load(const char *object_path)
+{
+#ifdef SILC_UNIX
+#if defined(HAVE_DLOPEN)
+#if defined(RTLD_NOW)
+  return dlopen(object_path, RTLD_NOW);
+#elif defined(RTLD_LAZY)
+  return dlopen(object_path, RTLD_LAZY);
+#else
+  return dlopen(object_path, 0);
+#endif /* RTLD_NOW */
+#endif /* HAVE_DLOPEN */
+#elif SILC_WIN32
+  return LoadLibrary(object_path);
+#else
+  /* XXX Symbian */
+#endif /* SILC_UNIX */
+  SILC_LOG_ERROR(("Shared objects are not supported on this platform"));
+  return NULL;
+}
+
+/* Close shared object */
+
+void silc_dll_close(SilcDll dll)
+{
+#ifdef SILC_UNIX
+  dlclose(dll);
+#elif SILC_WIN32
+  FreeLibrary(dll);
+#else
+  /* XXX Symbian */
+#endif /* SILC_UNIX */
+}
+
+/* Get symbol address from shared object */
+
+void *silc_dll_getsym(SilcDll dll, const char *symbol)
+{
+#ifdef SILC_UNIX
+  return (void *)dlsym(dll, symbol);
+#elif SILC_WIN32
+  return (void *)GetProcAddress(dll, symbol);
+#else
+  /* XXX Symbian */
+#endif /* SILC_UNIX */
+  SILC_LOG_ERROR(("Shared objects are not supported on this platform"));
+  return NULL;
+}
+
+/* Get error string */
+
+const char *silc_dll_error(SilcDll dll)
+{
+#ifdef SILC_UNIX
+  return dlerror();
+#elif SILC_WIN32
+  return NULL;
+#else
+  /* XXX Symbian */
+#endif /* SILC_UNIX */
+  return NULL;
+}